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G. W. STAATS, OF NEWCASTLE, PENNSYLVANIA.

Letters .Patent No. 82,171, dated September 15, 1868.

IMPROVEMENT IN GUIDES FOR SGROLL-SAWS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, G. W. STAATS, of Newcastle, in the county ofLawrence, and State of Pennsylvania, have invented new and vusefulImprovements in Guides for Scroll-sawing; and I do hereby declare thatthe following is a full,rclear, and exact description thereof, whichwill enable others skilled in the art to make and use the same,reference being had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a plan view of my invention,andshowing the method of using the same.

Figure 2 is a section of fig. 1 through the line x x 0f that ligure.

Figure 3 is a top view of the guide for'sawing arcs of great radius.

Figure 4 is a side view of the same.

Similar letters of reference indicate like parts.

The object' ofthis invention is to enable irregular figures and curvesto be sawn from wood by a scrollsaw without the necessity of working toa line, which latter operation is properly performed by a skillfulworkman, besides requiring the figure to be marked in the wood to guidethe operator.

I employ two guides or guide-plates, each differing from the other inconstruction, but both operating on the same general principle. The rstguide is used under the work to be sawn, and the second over the saidwork, as will hereinafter be fully set forth.

My irst method consists in employing a metal guide-plate, A a, the base,A, of which is let into the sawtable E, leaving the part a `to projectupward, as shown. The part a. is oval, and encloses the saw D with easycontact.

B-is the profile or pattern from which the wood is to be sawn.

C represents the plank or beard being sawn. This latter is laid upon thepattern, (the outline of which is shown in blue color ing. 1,) andaiiixed thereto temporarily by means of nails or brads. The patternkthus bearing the wood is brought to the guide, -and the prole restingagainst the guide, bears the wood C along with it, thus enabling the sawto cut a line, e e e, conforming, in contour, to the proiilcfff of thepattern B.

The dotted line el d shows the perspective path 'of the saw as thepattern is moved along in contact with the guide. l By this means anyvariety and complex configuration may be cut by a person of ordinaryintelligence, thus dispensing with a skilled sawyer.

The guides are made of any soft metal, as block-tin, or an alloy ofthesame with other metals, to produce a composition that will not causeinjurious friction with the saw.

The second form of guide is more particularly intended for use forcurves of great radius, and as its perfect operation is dependent uponcertain accessory parts, it is best adapted to set over the works,allowing the latter to pass under and in contact with it, it does underthe common holding-down foot generally used in scroll-sawing. n i

In this instance, the guide-plate A a is arranged with its base, A',upward, it being affixed on the end of the rod A, which is ordinarilyemployed to support the holding-down foot heretofore used.

The guide-plate A a/is thus held above thcsaw-table, and the work passedunder it, the guide serving tov hold thc latter down, in place of thefoot, as aforesaid.

When the guide is thus used above the work, it does not enclose the saw,as in the first case, but has merely a Slot, to steady the saw, asshown. l

In connect-ion with the upper guide, I employ auxiliary guide-plates th', which are held parallel to each other by links it', one end of whichlinks is 'pivoted to the ends of the plate e, the other ends beingrespectively connected to the ends ofthe plate t by means of set-screwspassing through slots in the links, and working in hollow threads cut inthe plate l..

The plates h h are spring-metal, and so'tbat they may be bent to anyrequisite curvature.

These plates are bent, and held so bent, by means of plates cj k,pivoted together, and to the plate it', as

shown, and a set-screw, l, passing through the plate j, with its point.arranged to bear against the Side of the guide-plate A a. p I

The plates hhb are arranged on each side of the part a of theguide-plate A a', riveted thereto. Now, by screwing in the screw l, theplate h' will be correspondingly curved, with suicient approximation forthe purpose, to form a circular arc.

The plate h is then brought parallel to it, and thus affords aguide-surface of greater bearing than would the parta.

These auxiliary guidef'platcs h h are Vdcsignedto a'orda greater extent'of bearing for the pattern when *circular work ofgreat radius is beingsawn, for in such work the pattern would be liable to deviate somewhatif the part a alone were used. .f i

The blue and red lines represent, respectively, wood being sewn, and thepattern.. Having thus described my invention, I elaiui as new, anddesire to secure by Letters Patentv 1. The guide A a, substantially asdescribed, in'co'mbipation with a scroll-saw and a pattern, all as andfor the purpose set forth.

2. The auxiliary guide-plates n h', links iz', and suitable accessoryplates k j k and screw l, for giving the vproper curvature to the platesla h', all substantially as shown and described,`in combination with theguideplate Af a' and a scroll-saw, all as set forth.

I G. WJ STAATS.

Witnesses.:

JAS. DIcKsoN, WILLIS Emmy.

